Classifications

• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B60—VEHICLES IN GENERAL
  • B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
  • B60C11/00—Tyre tread bands; Tread patterns; Anti-skid inserts
  • B60C11/03—Tread patterns
  • B60C11/0302—Tread patterns directional pattern, i.e. with main rolling direction
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B60—VEHICLES IN GENERAL
  • B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
  • B60C11/00—Tyre tread bands; Tread patterns; Anti-skid inserts
  • B60C11/03—Tread patterns
  • B60C11/0304—Asymmetric patterns
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B60—VEHICLES IN GENERAL
  • B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
  • B60C11/00—Tyre tread bands; Tread patterns; Anti-skid inserts
  • B60C11/03—Tread patterns
  • B60C11/12—Tread patterns characterised by the use of narrow slits or incisions, e.g. sipes
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B60—VEHICLES IN GENERAL
  • B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
  • B60C19/00—Tyre parts or constructions not otherwise provided for
  • B60C19/001—Tyres requiring an asymmetric or a special mounting
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B60—VEHICLES IN GENERAL
  • B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
  • B60C11/00—Tyre tread bands; Tread patterns; Anti-skid inserts
  • B60C11/03—Tread patterns
  • B60C2011/0337—Tread patterns characterised by particular design features of the pattern
  • B60C2011/0339—Grooves
  • B60C2011/0374—Slant grooves, i.e. having an angle of about 5 to 35 degrees to the equatorial plane
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B60—VEHICLES IN GENERAL
  • B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
  • B60C11/00—Tyre tread bands; Tread patterns; Anti-skid inserts
  • B60C11/03—Tread patterns
  • B60C11/12—Tread patterns characterised by the use of narrow slits or incisions, e.g. sipes
  • B60C11/1204—Tread patterns characterised by the use of narrow slits or incisions, e.g. sipes with special shape of the sipe
  • B60C2011/1209—Tread patterns characterised by the use of narrow slits or incisions, e.g. sipes with special shape of the sipe straight at the tread surface

Definitions

• the invention relates to a pneumatic vehicle tire for passenger cars, in particular for use under wintry driving conditions, with a tread pattern with a number of circumferential circumferential rows profile elements, such as blocks, wherein the profile elements have incisions, which are oriented at least substantially in the profile transverse direction, the total number the incisions in the tread elements extending in the tread center region is greater than the total number of incisions in profile elements running near the tread shoulder regions, the tread elements each being arranged in circumferentially repeating similar pitches of different circumferential lengths and circumferentially extending rows of tread elements being present the total number of pitches is different.
• Such a pneumatic vehicle tire is known from EP-BO 671 288.
• the tire has an asymmetrically shaped tread pattern which, in relation to the vehicle, has a tread inner and a tread outer portion.
• the dividing line between the tread elements in the tread inner and in the tread outer portion is compared with the tire equator, viewed when the tire is mounted offset to the vehicle outer shoulder facing away.
• the profile elements in the tread outer and in the tread inner portion are each arranged in circumferentially repeating, similar pitches, the total number of pitches in the tread outer portion is smaller than in the tread inner portion, and wherein the running surface in the two tread halves is at least substantially equal.
• a tire in which the total number of cuts in the profile elements in the tread center region is substantially greater than the total number of cuts in the profile elements in the shoulder regions is known from DE-A-199 57 915.
• the tread profile is divided by a central circumferential groove and by further circumferential grooves and transverse grooves in a shoulder block row and two middle rows of blocks, wherein the course of the transverse grooves results in a direction-bound profile.
• the blocks in the middle block rows have a greater extension in the tire transverse direction than the blocks in the shoulder block rows.
• All the blocks in the middle block rows are coupled to each other in the circumferential direction in the region of the central circumferential groove, wherein each of these blocks is divided by an at least substantially extending in the circumferential direction dividing groove into two substantially equal and also coupled to each other block parts.
• the profile is stiffened in the central region, whereby the driving behavior can be optimized.
• the invention has for its object to carry out a tire of the type mentioned in such a way that a simultaneous improvement of driving characteristics on snowy and on icy ground is possible.
• the object is achieved according to the invention in that the total number of pitches in at least one of the shoulder-side profile element rows between 1.7 and 3.2 times greater than the total number of pitches in at least one running in the tread center region series of profile elements.
• tread patterns with a large number of pitches in the shoulder area and a significantly lower number of pitches in the central area of the tread in combination with a large number of cuts in the middle area and a small number of cuts in the shoulder areas improve the driving characteristics snowy and also on an icy surface cause.
• the total number of pitches in at least one of the shoulder-side profile element rows is 2 times the total number of pitches in at least one row of profile elements in the tread center region. This measure is advantageous for an optimal design of the tread pattern.
• the total number of pitches in the shoulder-side profile element row whose total number is greater than that in at least one profile element row in the tread center region, at least 80, in particular at least 100.
• Another advantageous for the simultaneous improvement of driving characteristics on snow and on ice measure is that the profile elements in the shoulder-side profile element row whose total number of pitches larger is than those in at least one profile element row in the tread center area, are separated by transverse grooves of each other, which extend at an angle of 75 ° to 90 ° to the circumferential direction.
• the associated with this measure relatively strong transverse orientation of the profile elements in the shoulder-side profile element row causes a high transverse rigidity in this series. This measure is favorable for the properties of the profile on snowy and icy ground.
• the profile elements in the shoulder-side profile element row whose total number of pitches is greater than those in at least one profile element row in the tread center region have at most two incisions, which run parallel to the transverse grooves and open into a circumferential groove.
• the profile elements in the tread center region are each provided with a plurality of at least substantially extending in profile transverse direction and opening in circumferential grooves and / or grooves incisions ,
• the profile can also be designed to be substantially uniform by the profile element rows - except for the shoulder-side profile element row (s) with the larger total number of pitches - all have a matching total number of pitches.
• Fig. 1 is a plan view of a portion of a settlement of a tread with an embodiment of the invention
• Fig. 2 is a plan view of a portion of a settlement of a tread with a further embodiment of the invention.
• a - A denotes the tire equator and B denotes the width of the ground contacting part of the tread.
• the tread shown in Fig. 1 has a tread pattern shaped profile with matching in the two tread halves profile structures.
• the tread structures in one tread half are slightly offset circumferentially from those in the other tread half as will be described.
• the tread is composed of shoulder block rows 1 with blocks 2 and two middle rows 3 with block-like profile elements 4.
• the shoulder blocks 2 in the two rows of shoulder blocks 1 are separated from each other in the circumferential direction by transverse grooves 6, which are rectilinear, widen slightly towards the edge of the tread and with the circumferential direction an angle ⁇ , which is at least 75 °.
• the shoulder blocks 2 therefore have a pronounced transverse orientation, preferably with a slight inclination relative to the transverse direction, due to the directional design of the
• the two rows of shoulder blocks 1 are separated from the middle rows 3 by wide circumferential grooves 5 which, in the embodiment shown, have an overall serrated profile due to the orientation of the block flanks delimiting them.
• the two rows 3 of block-like Prof ⁇ lelementen 4 in the central region of the tread arise through grooves 7, which each consist of two mutually an obtuse angle enclosing groove portions 7a, 7b.
• the continuation of each second transverse groove 6 from the shoulder block rows 1 is one of the grooves 7 beyond the circumferential grooves 5, so that the number of block-like profile elements 4 per row 3 is half the number of shoulder blocks 2 of a shoulder block row 1.
• the groove portions 7a are inclined at an angle ß to the circumferential direction, which is between 50 ° and 75 °, and go via a kink in the groove portions 7b, which are inclined at an angle ⁇ to the circumferential direction, on the order of 5 ° to 15 °.
• the groove portions 7a have a constant width over their extension, the groove portions 7b are continuously narrowed to their sacknut rocken ends at or near the tire equator A -A.
• the grooves 7 in one tread half opposite those in the other tread half are inclined in opposite directions.
• the tread structures in one tread half are opposite those in the other tread half in FIG.
• Tread elements which repeat in the circumferential direction of the tread are commonly called pitches, wherein it is common in treads to provide pitches in different circumferential lengths, in so-called pitch lengths.
• the different pitch lengths arise, for example, in that the circumferential length of the profile elements or blocks and the width of the transverse grooves and the grooves is varied.
• two pitches P 1 , P 2 and P 3 , P 4 of different lengths are respectively provided in the shoulder block rows 1 and in the middle rows 3.
• the arrangement of the pitches over the tire circumference is determined by means of a computer program and optimized in such a way that dominating frequencies in the radiated tire / road noise are avoided as far as possible, the pitch sequences of the tread pattern not being the subject of the invention.
• the total number of pitches P 1 , P 2 in the shoulder block rows 1 in automotive tires designed according to the invention, which are intended for winter use, is at least 80, in a design without spikes preferably at least 100.
• the shoulder blocks 2 therefore have a relatively small circumferential length .
• the incisions 8 are parallel to the transverse grooves 6 on the extension of the shoulder blocks 2 and open into They are in the illustrated embodiment designed as straight incisions 8.
• Notches 9 are arranged at equal mutual distances, wherein per block-like profile element 4 at least six incisions 9 extend.
• All incisions 8, 9 have a width of 0.3 mm to 0.8 mm, in particular of about 0.4 mm, and a depth of at least 2 mm, wherein they preferably at least partially extend to tread depth.
• the number of pitches P 1 , P 2 in the shoulder-side profile structures over the tire circumference is 1.7 to 3.2 times the number of pitches P 3 , P 4 of the profile structures in the middle area.
• the total number of cuts 8 over the tire circumference is substantially less than the total number of cuts 9 in the central region of the tread. Viewed over the tread circumference, the total number of cuts 9 is 3 to 6 times the total number of cuts 8 in the shoulder block rows 1.
• the variant of a tread pattern shown in Fig. 2 is also executed directionally bound, but at the same time designed so asymmetrical that a tire with this tread a defined outside A and a defined inside I has.
• On the outer side A is a shoulder block row 1 ', which, analogous to the shoulder block rows 1 of the first embodiment, of blocks 2' and
• Transverse grooves 6 ' which are divided into pitches P 1 ' to P 4 'of different circumferential lengths, the total number over the tire circumference is at least 80.
• the straight transverse grooves 6 ' close with the circumferential direction the mentioned angle ⁇ of at least 75 °.
• the second shoulder block row 1 " which consists of blocks 2" and transverse grooves 6 ", as well as between the shoulder block rows 1 'and 1" extending profile elements, another block row 10 of blocks 11 and 12 transverse grooves and a row 3' of double blocks 4 ', 4 "are arranged in a pitch concept with two pitches P 5 ', P 6 ' of different lengths, the total number of pitches Pi 'to P 4 ' over the tire circumference being between 1.7 and 3.2 times the total number of pitches Pitches P 5 ', P 6 '
• the shoulder block row 1 " is separated from the central block row 10 by a circumferential groove 5 'running in the same tread half as the shoulder block row 1"
• the shoulder blocks 1 ' are provided with one or two cuts 8' which, in the embodiment shown, are zigzag-shaped and in profile transverse ridge run and in the circumferential groove 5 'open.
• the notches 8 ' can be combined with at least one further cut 8 ", which does not open into the circum
• the shoulder blocks 2 "in the shoulder block row 1" are slightly arched in
• each shoulder block 2 there are three or four notches 8 '" which are at least substantially equally spaced, transverse and have zigzag sections in combination with rectilinear sections At least one of the incisions 8 '"in each shoulder block 2" opens into the adjacent circumferential groove 5', which are provided in the double block row 3 ' Blocks 4 ', 4 "are separated in the transverse and circumferential direction by grooves 7', 7".
• the grooves 7 "in the embodiment shown are straight grooves whose orientation coincides with the orientation of the transverse grooves 12.
• grooves 7" open approximately centrally sections 7'b of the grooves 7 ', which extend mutually to the grooves 7 "inclined and an angle ⁇ 'of 20 ° to 40 ° with the circumferential direction
• the portions 7'a enclose an angle ⁇ ' with the circumferential direction in the order of 40 ° to 60 ° in the blocks 4 ', 4 "is in each case a number of mutually equally spaced, at least substantially in the profile transverse direction and zigzag running incisions 9' are provided, which pass through the blocks 4 ', 4" largely completely , wherein per block 4 ', 4 "at least five cuts 9' are provided.
• the total number of cuts 9 'in the profile elements 4', 4 "in the middle region is many times, in particular up to 6 times, greater than the total number of cuts 8 'in the shoulder blocks 2' of the shoulder block row 1 '.
• the invention is not limited to the illustrated embodiments. In particular, there are a large number of possibilities for designing profiles designed according to the invention.

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• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Tires In General (AREA)
• Pulleys (AREA)
• Turning (AREA)
• Vehicle Body Suspensions (AREA)

Priority Applications (1)

Applications Claiming Priority (2)

Publications (2)

Family

ID=39832744

Family Applications (1)

Country Status (5)

Families Citing this family (17)

Family Cites Families (6)

• 2007
  • 2007-09-18 DE DE102007044435A patent/DE102007044435A1/de not_active Withdrawn
• 2008
  • 2008-08-13 WO PCT/EP2008/060606 patent/WO2009037056A1/fr active Application Filing
  • 2008-08-13 EP EP08787157A patent/EP2193038B1/fr active Active
  • 2008-08-13 DE DE502008002905T patent/DE502008002905D1/de active Active
  • 2008-08-13 AT AT08787157T patent/ATE501868T1/de active
  • 2008-08-13 PL PL08787157T patent/PL2193038T3/pl unknown

Non-Patent Citations (1)

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